Abstract
Biochars showed a potential as adsorbents for organic contaminants, however, have not been tested for carbofuran, which has been detected frequently in water. This study provides evidences for the use of infused tea residue derived biochar for carbofuran removal. Biochars were produced at 300, 500 and 700 °C by slow pyrolysis and were characterized by proximate and ultimate analysis, FT-IR, SEM, BET and pore size distribution. Pyrolysis temperature showed a pronounced effect on biochar properties. The maximum carbofuran removal was achieved at pH 5. Freundlich and Temkin models best fit the equilibrium data. Biochars produced at 700 °C showed the highest sorption intensity. The adsorption process was likely to be a favorable chemisorption process with electrostatic interactions between carbofuran molecules and biochar surface. Acid-base interactions, electrophilic addition reactions and amide bond formations are the possible mechanisms of carbofuran adsorption. Overall, biochars prepared from tea waste can be utilized as effective adsorbents for removal of aqueous carbofuran.
| Original language | English |
|---|---|
| Pages (from-to) | 110-118 |
| Number of pages | 9 |
| Journal | Chemical Speciation and Bioavailability |
| Volume | 28 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 2016 Jan 12 |
| Externally published | Yes |
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Keywords
- Black carbon
- Chemisorption
- Isotherm modeling
- Pesticide
- Slow pyrolysis
ASJC Scopus subject areas
- Toxicology
- Health, Toxicology and Mutagenesis
- Chemical Health and Safety
Cite this
Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures. / Mayakaduwa, S. S.; Vithanage, Meththika; Karunarathna, Anurudda; Mohan, Dinesh; Ok, Yong Sik.
In: Chemical Speciation and Bioavailability, Vol. 28, No. 1-4, 12.01.2016, p. 110-118.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Interface interactions between insecticide carbofuran and tea waste biochars produced at different pyrolysis temperatures
AU - Mayakaduwa, S. S.
AU - Vithanage, Meththika
AU - Karunarathna, Anurudda
AU - Mohan, Dinesh
AU - Ok, Yong Sik
PY - 2016/1/12
Y1 - 2016/1/12
N2 - Biochars showed a potential as adsorbents for organic contaminants, however, have not been tested for carbofuran, which has been detected frequently in water. This study provides evidences for the use of infused tea residue derived biochar for carbofuran removal. Biochars were produced at 300, 500 and 700 °C by slow pyrolysis and were characterized by proximate and ultimate analysis, FT-IR, SEM, BET and pore size distribution. Pyrolysis temperature showed a pronounced effect on biochar properties. The maximum carbofuran removal was achieved at pH 5. Freundlich and Temkin models best fit the equilibrium data. Biochars produced at 700 °C showed the highest sorption intensity. The adsorption process was likely to be a favorable chemisorption process with electrostatic interactions between carbofuran molecules and biochar surface. Acid-base interactions, electrophilic addition reactions and amide bond formations are the possible mechanisms of carbofuran adsorption. Overall, biochars prepared from tea waste can be utilized as effective adsorbents for removal of aqueous carbofuran.
AB - Biochars showed a potential as adsorbents for organic contaminants, however, have not been tested for carbofuran, which has been detected frequently in water. This study provides evidences for the use of infused tea residue derived biochar for carbofuran removal. Biochars were produced at 300, 500 and 700 °C by slow pyrolysis and were characterized by proximate and ultimate analysis, FT-IR, SEM, BET and pore size distribution. Pyrolysis temperature showed a pronounced effect on biochar properties. The maximum carbofuran removal was achieved at pH 5. Freundlich and Temkin models best fit the equilibrium data. Biochars produced at 700 °C showed the highest sorption intensity. The adsorption process was likely to be a favorable chemisorption process with electrostatic interactions between carbofuran molecules and biochar surface. Acid-base interactions, electrophilic addition reactions and amide bond formations are the possible mechanisms of carbofuran adsorption. Overall, biochars prepared from tea waste can be utilized as effective adsorbents for removal of aqueous carbofuran.
KW - Black carbon
KW - Chemisorption
KW - Isotherm modeling
KW - Pesticide
KW - Slow pyrolysis
UR - http://www.scopus.com/inward/record.url?scp=84981156275&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84981156275&partnerID=8YFLogxK
U2 - 10.1080/09542299.2016.1198928
DO - 10.1080/09542299.2016.1198928
M3 - Article
AN - SCOPUS:84981156275
VL - 28
SP - 110
EP - 118
JO - Chemical Speciation and Bioavailability
JF - Chemical Speciation and Bioavailability
SN - 0954-2299
IS - 1-4
ER -